Business and Credit Concentrations (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010	Sep. 30, 2011	Sep. 30, 2010	Dec. 31, 2010
Concentration Risk [Line Items]
Total Manufacturers Produced	58.70%	72.60%	62.50%	71.30%
Business and Credit Concentration (Textual) [Abstract]
Domestic accounts receivable which do not require collateral from customers	$ 115.6		$ 115.6		$ 164.4
Foreign accounts receivable which are collateralized by letters of credit	150.1		150.1		121.4
Losses due to company's credit write-offs	0.3	2.2	2.8	3.8
Net assets held outside the United States	$ 325.3		$ 325.3		$ 322.0
Company's net sales to its five largest customers	17.40%	26.00%	18.80%	27.20%
Number of customers accounting for more than 10% of sales	0	0	0	0
Number of customers accounting for more than 10% of accounts receivable	0		0		0
Companies Top Five Manufacturers Produced
Concentration Risk [Line Items]
Manufacturer #1	24.50%	36.30%	29.50%	35.40%
Manufacturer #2	12.60%	12.20%	11.60%	12.80%
Manufacturer #3	9.00%	9.50%	8.10%	9.40%
Manufacturer #4	6.30%	8.60%	6.90%	9.00%
Manufacturer #5	6.30%	6.00%	6.40%	4.70%